ul,ol,li {
    list-style: none;
}

input::-webkit-search-cancel-button{
    display: none;
}

html,body {
    position: relative;
}

* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: #000;
}

.content {
    width: 100%;
    background-color: rgb(245, 245, 245);
}

.nav_1 {
        width: 100%;
        height: 85px;
        margin: 0 auto;
        background-color: rgb(36, 36, 36);
        color: rgb(172, 172, 172);
        border-bottom:5px solid red ;
}

nav {
    width: 1100px;
    height: 80px;
    margin: 0 auto;
    border-bottom: 1px solid black;
}

.logo {
    float: left;
}

nav > ul {
    display: flex;
    width: 500px;
    line-height: 85px;
    height: 85px;
    float: left;
    font-size: 13px;
    margin-left: 20px;
}

nav > ul > li {
    flex: 1;
}

.s_1 {
    float: right;
    display: flex;
}

.s_1 > div {
    margin-top: 25px;
    margin-left: 60px;
    border: oldlace 1px solid;
    width: 120px;
    height: 35px;
    border-radius: 35px;
    text-align: center;
    line-height: 35px;
}

.s_1 > input {
    flex: 1;
    width: 160px;
    height: 30px;
    border-radius: 30px;
    outline: none;
    background-image: url(../images/放大镜.png);
    background-repeat: no-repeat;
    background: position 0;
    margin-top: 30px;
    padding-left: 20px;
}
main {
    margin: 0 auto;
    width: 1100px;
    height: 800px;
    border-left: black solid 1px;
    border-right: black solid 1px;
}
